package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.beanutils.BeanUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 *@Auther: Tangguo
 * @Date: 2023-04-23  16:45
 * 自定义切面，实现公共字段自动填充处理逻辑
 */

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    /**
     * @param joinPoint:
     * @return void
     * @description 前置通知，在通知中进行公共字段的赋值
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段自动填充...");

        //1.获取到当前被拦截的方法上的数据库操作类型

            //1.1方法签名对象
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
            //1.2获得方法上注解对象
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
            //1.3获得数据库操作类型
        OperationType operationType = autoFill.value();


        //获取到当前被拦截的方法的参数--实体对象
         Object[] args = joinPoint.getArgs();
         if(args==null||args.length==0){
             return;
         }

         Object entity = args[0];

        //准备赋值的数据
         LocalDateTime now = LocalDateTime.now();
         Long currentId = BaseContext.getCurrentId();


        //根据当前不同的操作类型，为对应的属性通过反射来赋值
       /* if(operationType==OperationType.INSERT){
            //为4个公共字段赋值
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象属性赋值
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else if(operationType==OperationType.UPDATE){

            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象属性赋值
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }*/


        try {
            //根据当前不同的操作类型，为对应的属性通过反射来赋值
            if (operationType == OperationType.INSERT) {
                //为4个公共字段赋值
                BeanUtils.setProperty(entity, "createTime", now);
                BeanUtils.setProperty(entity, "createUser", currentId);
            }
            //为2个公共字段赋值
            BeanUtils.setProperty(entity, "updateTime", now);
            BeanUtils.setProperty(entity, "updateUser", currentId);
        } catch (Exception e) {
            e.printStackTrace();
        }




    }

}
